test_errno.py 文件源码

def test_open(self):
        libc_name = find_library("c")
        if libc_name is None:
            raise unittest.SkipTest("Unable to find C library")
        libc = CDLL(libc_name, use_errno=True)
        if os.name == "nt":
            libc_open = libc._open
        else:
            libc_open = libc.open

        libc_open.argtypes = c_char_p, c_int

        self.assertEqual(libc_open("", 0), -1)
        self.assertEqual(get_errno(), errno.ENOENT)

        self.assertEqual(set_errno(32), errno.ENOENT)
        self.assertEqual(get_errno(), 32)

        if threading:
            def _worker():
                set_errno(0)

                libc = CDLL(libc_name, use_errno=False)
                if os.name == "nt":
                    libc_open = libc._open
                else:
                    libc_open = libc.open
                libc_open.argtypes = c_char_p, c_int
                self.assertEqual(libc_open("", 0), -1)
                self.assertEqual(get_errno(), 0)

            t = threading.Thread(target=_worker)
            t.start()
            t.join()

            self.assertEqual(get_errno(), 32)
            set_errno(0)